Part of the roof of a four-story apartment block is on fire on Griffiths Road in Wimbledon. Firefighters were first called at around 9:54 am, with teams from across south and west London participating.
Three men were taken to hospital by the London Ambulance Service.
Five fire engines are present, the London Fire Department said in a statement.
It is not yet known what caused the fire.
Footage from the scene shows the apartment block on fire under scaffolding, with gray smoke billowing from under a plastic canopy.
More to follow…